mccarthy



Aug. 11, 1925.

J. H. MCCARTHY ROTARY GAsoLINE ENGINE Filed Feb, l2, 1923 Augi l l, 1925. 1,549,015

J. H. MCCARTHY ROTARY GASOLINE ENGINE Filed Feb. 12, 1925 2 Shoo'cwSheet 2 Vil/MM 1 a Mmm/frs Patented Aug. 11, 1925.

UNITED STATES JOHN H. MGGARTHY, OF CHICAGO, ILLINOIS.

ROTARY GASOLINE ENGINE.

Application filed February 12, 1923.

T 0 @ZZ whom it /m 0 1/ concern Be it known that I, Jer-IN H. MGCARTHY, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Rotary Gasoline Engines. of which the following is a full. clear` and exact description.

My invention relates to improvements in rotary gasoline engines, and it consists in the combinations, constructions. and arrangements herein described and claimed.

An object of my invention is to provide an improvement over that form ofthe device disclosed in my Patent No. 1,439,629. of December' 19, 1922. In said patent there is disclosed a rotary gas engine which consists of a cylinder which is adapted to be rotated by means of expanding gases. these gases being subjected toa high pressure by means of a reciprocating piston. In the present form of the device` I have shown a novel means for counteracting the centrifugal force which tends to force the blades of the rotating cylinder into engagement with the engine casing.

A further object of my invention is to provide a novel air cooling means for the device.

A. further object of my invention is to provide a. device of the character described which is relatively simple in construction, durable and efficient for the purpose intended, and which combines the merits of the reciprocating engine and the rotary engine in a single machine.

Other objects and advantages will appear in the following specitication. and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings. forming part of this application. in which Figure 1 is a vertical section through the device,

Figure 2 is a section along the line 2--2 of Figure 1.` and Figure 3 is a plan view of a modified form of the device.

In carrying out my invention. I provide two cylindrical casings 1 and 2 which communicate with each other by means of a passageway 3. The cylinders 1 and 2 are adapted to be cast in a single piece and may be made of any desired size. A drum 4 Serial No. 618,643.

is rotatably mounted in the cylinder 1 and is spaced slightly' from the peripheral walls of the cylinder. The drum carries two cylinders 5 and 6 which are alined with each other, and which extend diametrically across the drinn fl. Pistons 7 and 8 are slidably disposed in the cylinders 5 and G and are rigidly connected to each other by means of a rod 9. In Figure 1 I have shown the piston 7 as being disposed adjacent to the center of the cylinder 1, and the piston 8 as being disposed adjacent to the passageway 3.

The pistons 7 and 8 are reciprocated in the cylinders 5 and 6 by means of guide arms 1() that in turn are reciprocated by eccentrics 11. The guide arms 10 are connected to the rod 9 by means of a shaft 12. The free ends of the arms 10 carry rollers 1S and 14. The outer rollers 13 engage with an eccentric flange 15, while the inner rollers 13 engage with the eccentric 11. The arms 10 are rotated with the drum 4 by means of lugs 16 that are carried by the cylinders 5 and (i. The eccentric 11 and the eccentric flange 15 actuate the arms 10 so that the arms cause the pistons 7 and 8 to move to their outermost. position when the pistons are just past the passageway It will be noted from Figure 1 that the piston 8 is spaced slightly from the inner periphery of the drum 1 when the cylinder 6 is alined with the passageway 3. The piston 8 will continue to move toward the drum 1 and will be at the outer end of the cylinder 6 when the left hand side of the cylinder.` shown in Figure 1, is adjacent to the right hand side of the passageway 3. Then the cylinders 5 or 6 are moving by the intake pipes 17, the pistons therein are being moved toward the center of the drum 1, thereby drawing gas into the cylinders. The compression stroke takes place between the last intake pipe 17 and the spark plug 18. The gases are fully compressed when the cylinders are opposite the spark plug 18. At this point the gases are ignited, and of course are expanded.

The cylinders 5 and 6 are moving at a high speed and the gases which are ignited by the spark plug 18 will be conveyed to the passageway 3 instantly. The gases then rush from the cylinder through the passageway 3 and actuate the drum 19. Each of the cylinders 5 and 6 is provided with a packing 20 at its outer end, this packing Dit engaging with the inner periphery oit the cylinder 1. ln this manner, a gas-tight paokingis assured between the Cylinders and 6 and the cylinder l, The drinn Ll is supported by spokes' 21 Whieh in turn are carried by a hub 22. rEhe hub 22 is rotatsbl mounted in one Wall of the eyliiider 1 and is rigidly secured to e shaft 2B.

lt is obvious that the drums inust rotate at tho saine speef. plish this purpose, the shailt L is c' eted to a shatt Q4 ot the drinn 1./ by means oitl two gears 55, so tl'ist the drnins vfill rotate at the seine speed, ont in opposite directions and 19 With respcet to eaeh other. The :in if) is provided with spokes 2li which eend trein a eonnnon hub the heb in "urn being` mounted upon the sha'it El. n the present 'form oli' the device l he .e shown the drum 19 as being provided with livio blades It will be obvious that es n' i WW" desired indy be employed ivf ing troni the spirit and scope oi my fention, The drinn 19 nounted eccentrioally with respect to the cylinder T he blades 27 are adapted to move outwardly with respect to the drinn 1 9 so n; Ato lreep their outer ends in abutting mio'awenient with the inner periphery yot the ej nler Q.

To this end l provide novel ineens tor positively moving` the blades 2T with respect to the druin 19, and at the saine time 'for preventing; theblades troni gouging' into tlA inner Wall ot the cylinder 2 due to centi iigal force. Each of the blades consists of a curved plate 2S that is adapted to aline With the outer periphery of the drinn 19. This plate is hinged et QS). rllhe plate is bent at 30 and is; arcuate in shape ns at 31. The portion 31 is adapted to be received in a guiding slot 32 rott the drinn 19. rl`he Curved portion 31 is a portion oit :in ere which has the hinge 29 tor its center. lloth of the blades 27 are identical in eonstruotion.

The blades are guidd in their movement toward and sway troni the drinn 1f) by ineens ot linlrs The links are pivotally secured to the inner ends ot the portions S1 as at 34. The inner ends ot the linllfs ore pivotally mounted upon a rino; rlThe ring 35 is eoncentrieally disposed with rcspeet to the cylinder Q, and is rotzf.tably mounted upon a dise 3G. Bell beorine's 37 are disposed between the disc 35 and `the ring 35. lt will be noted that the points 38, to which the links are pivotally secured tothe ring 35i, are diametrially disposed withA respect to each other. lt Will be noted from this lconstruction that the linlrs will permit the points'() ot the blades 27 to aout theiinner periphery ot the cylinder 2 at ell times.` These links not only perinit he bla-des '2T/ to in ove in the manner above de.-

soribed, but prevent the blades troni gong ing into the inner surface of the cylinder 2. TWhen the inner ends of the linlrs 33 come the nearest to the shaft Qel, the blades `28 will be in their closed position. it this point, the periphery ot the drrun `1Q is disposed adjacent to the inner periphery ot the cylinder 2. rlhe packing,- 39 is disposed adjacent to the point 30 and trietionally engages with the inner periphery oi the cylinder In this manner a gas-tight pinching is assured between the bliade 27 and the. cylinder 2.

lt Will be noted 'troni Figure l that the outer periphery ot the drum 19 is ben inivzirdly at 10. This construction provides o relatively Wide expansion chamber i'or the gases. The driuns et and 19 rotate so as to cause one of thel cylinders 5 or 6 to eline with the passageway 3 when one oit the blades 27 is in the position shoivn in ffigf ure 1. rllhe expanding gases which are ejected troni the cylinder 5 and oy iinpinge upon the blades 2i' :ind cause the drinn 19 to rotate. Vlhe drnin 19 in turn rotates the druin 4t. rlfhe shaft 2e `is the power shnflt oit the device, and at the seine time iets a.: o eain shaft.

The drinn 1() is cooled in a novel inanner. The Cylinder' 2 `has openings l1 which erinit air to pass `through the cylinder 2. he shaft .f3-fl carries a sinall tan (see Figure or other like air n'iovingi` in ns. The tan is adopted to drain' nir tliroiiggh the openings on one side the cylinder 2 and to expel it through the openings on the other side ot thel cylinder. rlhe d iin 1) carries curved detleetor plates el?) ivliieh ere disposed :adjacent to the blades 27 end which ero sdaptcd to diret-t the oir against the sides ol the blades. A. seeond detleotor plate L. 's carried bj; the blades 2T and with the v rThe plate lll stops short ot, the portion 31 so :is to pei-init the sir to 'flow lgxetivocn the plate 4A- and the plete E253 and into contest with the boi-tion 3 From this point the :tir posses throng-h the vmll -ot the drun. 19 by ineens ot mi opening "l ne sir enters the passageway toi-ined by the pletes 253 end 1e/l by ineens ot an openine From this construction it Will be apparent the` a current ot air Will be continuously torced along); the inner sides ot the portions 28 and 3l. ln this manner the l'alzides 27 :ire eticotively oooled.

From the foregoing description of the various parts of the devitej the operation thereof may be readily understood. ln op eration. the power shaft 2st rotates the drum il so to ceiuse `the cylinders to eline with the passageway 3 when one of the blades 27 is dispos-ed adjacent to the passageway. The pistons 7 and 8 are moved so as to draw into the cylinders 5 and 6 as the Cylinders are passing the intake pipes 17, and to i any appreciable extent.

compress the gas in the cylinders when the cylinders are moving between the last intake pipe and the spark plug 18. The eccentric l1 and the eccentric flange 15 are relatively large so as to provide a long surface over which the rollers 13 and 14 ride. In this manner a great deal of force is exerted upon the pistons 7 and 8 without reducing the speed of the shaft 23 to By providing two rollers 13 and 14 instead of one, I cause the rollers to rotate in one direction only. The eccentric 11 is enlarged, as at 47, so as to cause the inner rollers 14 to always engage 'n with the outer peripheryv of the eccentric.

The outer ends of the rollers 13 and 14 are secured to each other by means of a link 48.

The blades 27 are controlled `.in their movement by means of the links 33 and the ring 35. This mechanism permits the blades 27 to be disposed adjacent to the inner periphery of the cylinder 2 during the entire movement of the drum 19. The special purpose of this mechanism is to revent the blades from gouging into the inner wall of the cylinder 2. lt will also be noted that the blades are kept cool during the entire operation of the device. Moreover, the cold air is directed to the portions of lthe blades which are subjected to the greatest amount of heat. The device is relatively simple in construction and provides a novel means for combining the advantages of the reciprocating engine with the advantages of the rotary engine.

In Figure 3, I have shown a modified form of a means for moving the blades 27 toward and away from the drum 19. In this form of the device the links 33 aie 'slidably mounted in slots 54 of the ring 35. The inner ends of the links 33 are adapted to swing slightly with respect to the ring 35. It will be noted that when the points 34 of the blades 27 are in alinement with a line that extends 'through the axis of the the disc 36. It is obvious that this movement is very slight.

I claim:

l. In a device of the class described, a cylinder having openings in its side walls, a drum mounted eccentrically within said cylinder, angularly shaped blades hingedly carried by said drum, a plate carried by said blades and forming an air passage with said blades lto cause air to liow to the end of thel blade, the periphery of said drum having air inlet and outlet openings communicating with said passageway, a deflector plate carried by said drum and being adapted to guide the air to said passageway, and means for drawing the air into the cylinder through the openings on one side of said cylinder and for forcing the air out through the openings on the other side of said cylinder.

2. A rotary gasoline engine comprising a cylinder, a drum eccentrically mounted in said cylinder, blades carried by said drum, said blades being adapted to contact with the inner surface of said cylinder during the entire rotation of said drum, said drum having openings for permitting air to pass to and from the inner sides of said blades and means for forcing air to and from said blades.

3. A rotary gasoline engine comprising a cylinder, a drum eccentrically mounted in said cylinder, blades carried by said drum, said blades being adapted to contact with the inner surface of said cylinder during the entire rotation of said drum, said drum having openings for permitting air to pass to and from the inner sides of said blades means for forcing air to and from said blades, and means for conveying the air to the ends of said blades.

4. A rotary gasoline engine comprising a cylinder, a drum eccentrically mounted in said cylinder, blades carried by said drum, said blades being adapted to contact with the inner surface of said cylinder during the entire rotation of said drum, said drum having openings for permitting air to pass 'to and from the inner sides of 'said blades, means for forcing air to and from said blades, means for conveying the air to the ends of said blades, and means for drawing air into the cylinder and for forcing the air from said cylinder.

JOHN H. MCCARTHY. 

